| 54 |
Titel |
TI |
[EN] Improvements in Balances and Balance Springs for Watch, Clock, and like Escapements. |
| 71/73 |
Anmelder/Inhaber |
PA |
PERRET PAUL, CH
|
| 72 |
Erfinder |
IN |
PERRET PAUL, CH
|
| 22/96 |
Anmeldedatum |
AD |
29.10.1897 |
| 21 |
Anmeldenummer |
AN |
|
|
Anmeldeland |
AC |
GB |
|
Veröffentlichungsdatum |
PUB |
05.02.1898 |
33
31
32 |
Priorität |
PRC
PRN
PRD |
CH
null
18970506
|
| 51 |
IPC-Hauptklasse |
ICM |
|
| 51 |
IPC-Nebenklasse |
ICS |
|
|
IPC-Zusatzklasse |
ICA |
|
|
IPC-Indexklasse |
ICI |
|
|
Gemeinsame Patentklassifikation |
CPC |
|
|
MCD-Hauptklasse |
MCM |
|
|
MCD-Nebenklasse |
MCS |
|
|
MCD-Zusatzklasse |
MCA |
|
| 57 |
Zusammenfassung |
AB |
[EN] 25,142. Perret, P. May 6, [date claimed under Sec. 103 of Patents &c. Act, A.D. 1883]. Balances; balance springs.-The balance spring is made of an alloy the elasticity of which increases with a rise in temperature. Such an alloy is made of nickel and steel in the proportions of 27 or 28 of the former and 73 or 72 of the latter. A balance which only expands slightly is composed of 35 to 36 parts of nickel and 65 to 64 parts of steel. |
| 56 |
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| 56 |
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| 56 |
Entgegengehaltene Nichtpatentliteratur/Zitate,
vom Anmelder genannt |
CTNP |
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